/Engine/Source/Runtime/Engine/Classes/Components/SkeletalMeshComponent.h
Management function for if we want to do an evaluation but may already be running one bBlockOnTask - if true and we are currently performing parallel eval we wait for it to finish bPerformPostAnimEvaluation - if true and we are currently performing parallel eval we call PostAnimEvaluation too return true if parallel task was running.
bool HandleExistingParallelEvaluationTask ( bool bBlockOnTask, bool bPerformPostAnimEvaluation )